increase performance and stability. The current configuration variables and status data is retrieved and presented in a
brief format along with some basic performance suggestions.
Download script on the server:
- Code: Select all
wget https://raw.github.com/major/MySQLTuner-perl/master/mysqltuner.pl
Run script:
- Code: Select all
perl mysqltuner.pl
Insecure download & run approach:
- Code: Select all
curl -sSL mysqltuner.pl | perl
Example of script output:
- Code: Select all
# perl mysqltuner.pl
>> MySQLTuner 1.7.0 - Major Hayden <major@mhtx.net>
>> Bug reports, feature requests, and downloads at http://mysqltuner.com/
>> Run with '--help' for additional options and output filtering
[--] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.7.17-log
[OK] Operating on 64-bit architecture
-------- Log file Recommendations ------------------------------------------------------------------
[--] Log file: /var/log/mysqld.log(8K)
[OK] Log file /var/log/mysqld.log exists
[OK] Log file /var/log/mysqld.log is readable.
[OK] Log file /var/log/mysqld.log is not empty
[OK] Log file /var/log/mysqld.log is smaller than 32 Mb
[!!] /var/log/mysqld.log contains 13 warning(s).
[OK] /var/log/mysqld.log doesn't contain any error.
[--] 1 start(s) detected in /var/log/mysqld.log
[--] 1) 2016-12-25T10:50:42.851104Z 0 [Note] /usr/sbin/mysqld: ready for connections.
[--] 1 shutdown(s) detected in /var/log/mysqld.log
[--] 1) 2016-12-25T10:50:38.899513Z 0 [Note] /usr/sbin/mysqld: Shutdown complete
-------- Storage Engine Statistics -----------------------------------------------------------------
[--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MEMORY +MRG_MYISAM +MyISAM +PERFORMANCE_SCHEMA
[--] Data in MyISAM tables: 5M (Tables: 63)
[--] Data in InnoDB tables: 2M (Tables: 55)
[OK] Total fragmented tables: 0
-------- Security Recommendations ------------------------------------------------------------------
[OK] There are no anonymous accounts for any database users
[OK] All database users have passwords assigned
[--] Bug #80860 MySQL 5.7: Avoid testing password when validate_password is activated
-------- CVE Security Recommendations --------------------------------------------------------------
[--] Skipped due to --cvefile option undefined
-------- Performance Metrics -----------------------------------------------------------------------
[--] Up for: 9s (15 q [1.667 qps], 9 conn, TX: 44K, RX: 1K)
[--] Reads / Writes: 100% / 0%
[--] Binary logging is disabled
[--] Physical Memory : 488.6M
[--] Max MySQL memory : 202.8M
[--] Other process memory: 134.8M
[--] Total buffers: 169.0M global + 1.1M per thread (30 max threads)
[--] P_S Max memory usage: 72B
[--] Galera GCache Max memory usage: 0B
[OK] Maximum reached memory usage: 170.1M (34.82% of installed RAM)
[OK] Maximum possible memory usage: 202.8M (41.50% of installed RAM)
[OK] Overall possible memory usage with other process is compatible with memory available
[OK] Slow queries: 0% (0/15)
[OK] Highest usage of available connections: 3% (1/30)
[OK] Aborted connections: 0.00% (0/9)
[OK] Query cache is disabled by default due to mutex contention on multiprocessor machines.
[OK] No Sort requiring temporary tables
[OK] No joins without indexes
[OK] Temporary tables created on disk: 15% (10 on disk / 66 total)
[OK] Thread cache hit rate: 88% (1 created / 9 connections)
[OK] Table cache hit rate: 93% (102 open / 109 opened)
[OK] Open file limit used: 0% (15/5K)
[OK] Table locks acquired immediately: 100% (102 immediate / 102 locks)
-------- Performance schema ------------------------------------------------------------------------
[--] Performance schema is enabled.
[--] Memory used by P_S: 72B
[--] Sys schema is installed.
-------- ThreadPool Metrics ------------------------------------------------------------------------
[--] ThreadPool stat is disabled.
-------- MyISAM Metrics ----------------------------------------------------------------------------
[!!] Key buffer used: 18.3% (1M used / 8M cache)
[OK] Key buffer size / total MyISAM indexes: 8.0M/3.2M
[!!] Read Key buffer hit rate: 50.0% (6 cached / 3 reads)
-------- InnoDB Metrics ----------------------------------------------------------------------------
[--] InnoDB is enabled.
[--] InnoDB Thread Concurrency: 0
[OK] InnoDB File per table is activated
[OK] InnoDB buffer pool / data size: 128.0M/2.2M
[!!] Ratio InnoDB log file size / InnoDB Buffer pool size (75 %): 48.0M * 2/128.0M should be equal 25%
[OK] InnoDB buffer pool instances: 1
[--] Number of InnoDB Buffer Pool Chunk : 1 for 1 Buffer Pool Instance(s)
[OK] Innodb_buffer_pool_size aligned with Innodb_buffer_pool_chunk_size & Innodb_buffer_pool_instances
[!!] InnoDB Read buffer efficiency: 75.94% (1635 hits/ 2153 total)
[!!] InnoDB Write Log efficiency: 0% (2 hits/ 0 total)
[OK] InnoDB log waits: 0.00% (0 waits / 2 writes)
-------- AriaDB Metrics ----------------------------------------------------------------------------
[--] AriaDB is disabled.
-------- TokuDB Metrics ----------------------------------------------------------------------------
[--] TokuDB is disabled.
-------- XtraDB Metrics ----------------------------------------------------------------------------
[--] XtraDB is disabled.
-------- RocksDB Metrics ---------------------------------------------------------------------------
[--] RocksDB is disabled.
-------- Spider Metrics ----------------------------------------------------------------------------
[--] Spider is disabled.
-------- Connect Metrics ---------------------------------------------------------------------------
[--] Connect is disabled.
-------- Galera Metrics ----------------------------------------------------------------------------
[--] Galera is disabled.
-------- Replication Metrics -----------------------------------------------------------------------
[--] Galera Synchronous replication: NO
[--] No replication slave(s) for this server.
[--] This is a standalone server.
-------- Recommendations ---------------------------------------------------------------------------
General recommendations:
Control warning line(s) into /var/log/mysqld.log file
MySQL started within last 24 hours - recommendations may be inaccurate
Variables to adjust:
innodb_log_file_size should be equals to 1/4 of buffer pool size (=32M) if possible.
Basic statistics gathering tool: http://mysqlmymon.com/
Innotop - is a 'top' clone for MySQL
by